The Jamaica cluster is named for the island nation of Jamaica in the
Caribbean Sea. The arrival time data required a crustal model with quite
shallow Moho, about 20 km, and a single layer crust fits the data well.
However, the overlap between direct crustal phases and Moho-refracted
phases makes phase identification (and depth control) more challenging
than usual. The cluster contains two moderate-sized events, a 5.6 Ms
event on November 12, 1988 and a 5.5 mb event on January 13, 1993. Over
half the events are recorded teleseismically, but smaller events have
been retained to improve the statistical power for location calibration.
All events have depth control, mainly from near-source and
local-distance readings, but several are constrained by teleseismic
depth phases.
